Personal watercraft users play an important role in protecting Minnesota waters from aquatic invasive species (AIS).
Invasive species impact personal watercraft users. Invasive plants, such as mats of starry stonewort, curly-leaf pondweed, or Eurasian watermilfoil can make navigation difficult and may become clogged in the engine intake. Zebra mussels can damage engines and their sharp shells can cut the feet of swimmers. Invasive species change how we use and enjoy Minnesota waters.
Personal watercraft users can unintentionally transport aquatic invasive species. Seeds, eggs, larvae, small animals, plant fragments and water can be trapped inside your gear.
- Microscopic larvae of zebra mussels can be in the water of engines.
- Aquatic plants can entangle on equipment.
- Mud in footwells may contain small invasive species, such as zebra mussels, starry stonewort bulbils, or faucet snails.
To help protect Minnesota waters and comply with state law, here are some best practices to reduce your risk of spreading invasive species from one water body to another:
Before Your Trip
Plan your visit and gear. If you are planning to go to multiple locations:
- Consider visiting a courtesy decontamination site before moving between waterbodies.
- Schedule your trip on lakes and rivers without AIS first, before visiting water bodies the DNR has listed as infested with AIS.
- If possible, use different gear for each lake or river you visit.
Always arrive cleaned and drained. Double-check all gear and equipment to ensure it is cleaned and drained before heading out. Run the engine for 5 seconds to ensure all water is expelled. Always drain water from watercraft and equipment away from a waterbody.
Know the laws:
- It is illegal to transport aquatic plants or prohibited invasive species, dead or alive.
- It is illegal to launch watercraft or place a trailer in the water if it has aquatic plants or prohibited invasive species attached, or water present in compartments.
- It is illegal to transport water away from Minnesota lakes and rivers. You must remove all drain plugs and all water must be drained before transporting equipment off the access site or riparian property.
Know what to look for. Learn how to identify aquatic invasive species.
After You Are Done on the Water
Take these required steps before leaving the lake, river or wetland:
- Clean your watercraft and any recreational equipment to remove plants, small animals, mud, and debris. Check around bunks and rollers, axels, and near the license plate on the trailer. Check the footwells and engine intake for vegetation or attached invasive species.
- Drain all water. Remove water from footwells and run the engine for 5 seconds to expel water. Leave plugs out during transport.
Consider these additional recommendations. Some invasive species are small and difficult to see. To remove or kill them, take one or more of the following precautions before moving to another lake or river:
- Decontaminate your boat, equipment and gear by rinsing with hot water at 120 degrees for 2 minutes or 140 degrees for 10 seconds. If needed, spray with high pressure to remove attached debris.
- Find locations of free, professionally operated courtesy decontamination sites.
- Spray your equipment with high-pressure water.
- Rinse your gear with tap water.
- Dry your gear for 5 days before using it in another lake or river, whenever possible.
Report suspicious aquatic plants and animals to the DNR. Take a picture or collect a specimen, note the exact location, and contact your DNR Invasive Species Specialist or log in and submit a report through EDDMapS.
Learn More
Learn about how to prevent the spread of invasive species while doing other activities on Minnesota waters.
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